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Comp Biochem Physiol Part D Genomics Proteomics. 2019 Jun;30:305-311. doi: 10.1016/j.cbd.2019.04.003. Epub 2019 Apr 11.

Genome-wide identification of ATP-binding cassette transporters and expression profiles in the Asian citrus psyllid, Diaphorina citri, exposed to imidacloprid.

Author information

1
Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China; State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China.
2
Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China; State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China. Electronic address: wangjinjun@swu.edu.cn.

Abstract

ATP-binding cassette (ABC) transporters belong to a large protein superfamily found in both prokaryotic and eukaryotic organisms. In arthropods, ABC transporters are involved in defense and resistance to insecticides. The Asian citrus psyllid (ACP), Diaphorina citri, is a major vector of the Huanglongbing pathogen (Candidatus Liberibacter asiaticus) worldwide. In this study, the ABC transporter genes were identified based on the transcriptome and genome database of D. citri. A total of 44 DcitABC transporters were identified and grouped into 8 subfamilies (ABCA-ABCH), including 4 DcitABCAs, 4 Bs, 5 Cs, 2 Ds, 1 E, 3 Fs, 15 Gs and 10 Hs, respectively. Phylogenetic analysis of ABC transporters revealed a close relationship between D. citri and Laodelphax striatellus. qPCR analyses showed that several DcitABC transporters were highly expressed in fat body, midgut and the hindgut with Malpighian tubules. In particular, DcitABCG11 and DcitABCG14 were most highly expressed in the hindgut. The transcript abundance of 11 DcitABC genes was significantly upregulated upon exposure to an LC50 concentration of imidacloprid. The expressions of three cytochrome P450 genes and one glutathione S-transferase gene were also significantly elevated. This suggested that DcitABC genes, together with metabolic enzyme genes, are associated with imidacloprid detoxification.

KEYWORDS:

ABC transporters; Detoxification; Huanglongbing vector; Imidacloprid induction; Transcriptional expression

PMID:
31004937
DOI:
10.1016/j.cbd.2019.04.003

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